Just battled Coeli with my main battle pet Reanel as part of a battle quest and ran into a strange situation. After my first move brought Coeli to 0hp and clicked the red button to end the battle, I got the incorrect conclusion error. I went back to the battle and clicked the clear/white end battle button and the next screen claimed I lost against Coeli, which is highly improbable. I refreshed and it maintained I lost against Coeli, so I went back to the battle quests. And received a prize for winning against Coeli. Thinking the glitch resolved itself I attempted to move on, only to find the Reanel is now at 0 health as if I actually lost.

Couldn't find any mention of this being a thing, so I thought I'd report it.